Lack of communication (to say the least)

TookMy car in for a service on Tuesday for it to be ready by Friday. To my surprise my car wasn't ready on Friday. Left the dealership around 16:00. So it took 4 days to service my car. The sales consultant wasn't clear with the terms and conditions as she kept on reminding me that she serviced my car without a deposit. However I made it clear to her that I'll be getting paid on Fri and I need the car by Fri